With the release of OS X 10.10 Yosemite, placing a phone call (using your iPhone) from the comfort of your Mac became a reality. Ever wonder how to make phone calls in OS X Yosemite? Well, with CallPad ! CallPad is a very simple app to ease making phone calls without picking up your iPhone in OS X Yosemite. CallPad requires an iPhone with iOS 8 and an activated carrier plan. Phone calling works with any iOS device that supports iOS 8 and any Mac that supports Yosemite.